Drilling-machine.



0. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED JAN-25.1%].

1,244,385. Patented 001;. 23,1917.

3 SHEETS-SHEET I.

D. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED JAN-25.1917.

1,244,385. Patented Oct. 23,1917.

3 SH'EETSSHEET 2.'

WITNESSES INVENTOR D/HYE -PEHHR MM A TTORNEYS D. SPEHAR.

DRILLING MACHINE.

APPLICATION FILED IAN.25. I917.

1,244,385. Patented Oct. 23,1917.

' 3 SHEETS-SHEET 3.

/5 2/ U B 9 23 I I 26 25 I I I I INVEAITOR D fl NE 5 P B 1-1 A R ,4from; rs

WITNESSES 7/, I/M

DANE SPEHAR, OF MIAMI, ARIZONA.

DRILLING-MACHINE.

Specification of'Iietters Patent.

Patented :Oct. 23, 1917.

Application filed January 25, 1917. Serial N 0. 144,414.

1 b cZZ who-m it may concern:

Be it known that I, DANE SIEI-IAR, a citizen of the United States, and aresident of ll'illtlllll; in the county of Gila and State of Arizona,have made certain new and useful improvements in Drilling- Machines ofwhich the following is a specification.

One of the principal objects of my inven tion is to provide an improveddrilling machine designed particularly for prospecting work which may beoperated by one man, and so constructed that it may be readily takenapart, and packed in a relatively small space for transportation.

Another object of the invention is to proide an improved drillingmachine which is mechanically operated, and in which the blows aredelivered through the alternate contraction and expansion of a spring.

A further object of the invention provides an improved method ofautomatically causing the intermittent rotation of the drill.

A still. further object of the invention is to provide an improved drillwhich is comparatively simple, durable, efficient in operation, andinexpensive to manufacture and maintain. v

With these and other objects in view which will become apparent as thedescription proceeds, the invention resides in the construction,combination and arrangement of parts hereinafter =more fully describedand claimed, and illustrated in the accompanying drawings in which likecharacters of reference indicate like parts throughout the severalfigures, of which:

Figure 1 represents an elevational view of a drill constructed accordingto my invention.

Fig. 2 represents an elevational view looking at right angles to Fig. 1.

Fig. 3 represents an elevational view of a portion ofthe drill shaftshowing the arnngement of the key-ways. y

Fig. 4 represents a longitudinal sectional view takenthrough the drillon the plane indicated bythe line H of Fig. 1.

Fig. '5 represents a horizontal sectional View taken on the line 5-5 ofFig. 4.

Fig. 6 represents a horizontal sectional view taken on the line 66 ofFig. 4;.

Fig. 7 represents a horizontal sectional view taken on the plane.indicated by the line 77 of Fig. 4.

Fig. 8 represents a view in, perspective of the trigger.

Fig. 9 represents a horizontal sectional view taken on the planeindicated by the line 9-9 of Fig. l.

Fig. 10 represents a fragmentary vertical sectional view taken on theplane indicated by the line 10-10 of Fig. 6.

Fig. 11 represents a fragmentary elevational View of the ratchet sleeveand the trigger associated therewith, showing the position of the partsas the sleeve begins an upstroke.

Fig. 12 represents a similar View showing the position of the partsduring the upstroke of the sleeve, and

F ig. 13 represents a similar view showing the position of the partsduring the downstroke of the sleeve.

Referring more particularly to the drawing, a cylindrical casing, inwhich the drill shaft reciprocates, is indicated at 5, and at the lowerend of the casing is disposed a plug 6, through which the drill shaft orspindle slides, said plug being threaded into the end of the casing andbeing provided with a polygonal head 7, whereby it may be readilyremoved when desired.

The upper end of the casing isturned into an internally threaded boss 8,which carries the spaced legs 9 of a handle. The boss may be securedagainst rotation relatively to the casing by means of set screws 10. Theupper ends of the legs 9 are offset outwardly from each other andsupport a suitable handle 11, whereby the operator may grip the machine.A spreader 12 is arranged between the lugs 9 for suitably spacing andsupporting them.

Extending laterally from the legs 9 are the opposite pairs of spacedears 13 and 14 respectively, such ears forming terminals of strips ofmetal secured by rivets or other suitable fastenings 15 to the opposedinner faces of the legs 9. Threaded into an opening in each ear is avbrass or other suitable bushing 15, and these bushings support the stubshafts 16. Each pair of ears thus rotatably supports one of the shafts16. Mounted on the shafts 16 for rotating them arethe intermeshing gearwheels 17 of similar size, and from this arrangement it follows thatwhen one of the gears is driven the shafts 16 will be driven in oppositedirections, and at a common rate of speed. Adjustably mounted by a boltand slot connection indicated at 18 on oneof the gears 17 is a crank arm19, carrying a crank handle 20, by means of which the gears may bemanually driven.

Keyed on each of the shafts 16, between the bosses in which such shaftis journaled, is a driving gear. Each driving gear includes a pair ofspaced substantially annular plates 21, which plates at diametricallyopposed points, are flattened as at (see Fig. 4.) Connecting theseplates adjacent their peripheries are the opposed series of pins 23 and2e, on which pins and between the plates, rollers are mounted.

The rollers are situated at equally spaced apart points, around theentire periphery of the plates 21, except at those portions of theplates which are flattened, as indicated in Fig. 4 and this constructionforms in effect interrupted or mutilated driving gears. These gears movein opposed directions, and at a common rate of speed as the gears 1'7are rotated.

The upper portion of the spindle or shaft is indicated at 26 and thelower portion of saic. shaft at 27. Segment 26 is provided on opposedsides with substantially cylindrical rack teeth 28 having flatt nedlower surfaces 29, and the rack teeth in each series correspond innumber to the number of rollers in each of the two series of rollerscarried by the driving gears. The teeth 28 project inwardly beyond theperipheries of the driving gears, said segment 26 being, as indicated inFig. a, arranged between the driving gears, and as indicated in thedrawing, as the driving gears are revolved, the rollers engage beneathtee teeth 28 and move the drill spindle upwardly until such time asopposed flattened portior of the driving gears move into proximity withthe segment 26, at which time the teeth 28 will be free of engagementwith any of the rollers, whereby the spindle is released, it being moveddownwardly under the influence of the spring 30 for delivering a blow.By having each of the driving gears equipped with two-series of rollersit will be evident that the spindle will he raised twice during onecomplete revolution of the gears 17, so that rapid blows will thus bestruck, without driving the gears 17 above a moderate speed. 7

While the upper segment 26 of the spindle has a reciprocatory motiononly, the lower segment 27 has a rotary as well as a reciprocatorymotion, and in order to allow rotation of the lower segment relativelyto the upper, a suitable coupling is provided. This coupling includes asplit shouldered ring indicated generally at 31, and each of thesegments of the ring has formed thereon an upwardly extending arm 32provided with a lug fitting into an indentation 355 formed in thespindle segment 26. Suitable set screws 34 detachably secure each of thearms 32 to the spindle segment 26. The shoulders formed on the ringsegments 31 thus form a collar which fits into a groove 35 cut in theupper end of the spindle segment 27 and circumferentially of the same.in disconnecting the spindle segments, it is only necessary to unscrewthe set screws 34: suiliciently to disengage the segment. 26 whereuponthe segments of the spindle may be taken apart.

A spring 30 before mentioned bears at its upper end against an annularring 86 ar ranged within the casing 5, and held against movementupwardly, in said casing, by means of a collar 37 riveted or otherwisesecured in place as indicated at 38. The lower end of the springbearsagainst a ring 39 which is loose within the casing, and which abutsagainst the upper end of the ratchet sleeve 5L0. This sleeve is keyed orotherwise fixed on the spindle segment 2 and moves with said segment.When the spindle is drawn upwardly as the gears are rotated, the springis compressed, and the moment that the spindle is released the action ofthe spring in forcing the spring downwardly, delivers a working blow.Downward movement of the spindle, if not previously stopped byengagement of the drill point with the work, is limited by the movementof the lower end of ratchet sleeve 40 into engagement with the plug 6.

Arranged within the casing is a ratchet wheel 41. This ratchet wheelsurrounds the ratchet sleeve and said ratchet sleeve is adapted toreciprocate through the wheel. This wheel 'is held against reciprocatorymovement relatively to the casing by means of a substantially Ushapedkeeper indicated at i2, the ends of which keeper projecting toward thespindle occur above and below the ratchet wheel. The keeper does not,however, interfere in the slightest witn the rotary movement of theratchet wheel. in order that the ratchet wheel and ratchet sleeve willrotate in unison at the same time that the sleeve reciprocatesrelatively to the wheel, said wheel is prcwided with gib keys &3slidable in grooves in the sleeve, hereinafter described.

In order that the ratchet wheel 41 will be allowed to rotate only in onedirection, spring pressed ,pawls 4 1 are provided. These pawls arearrangedat diametrically opposed points of the ratchet wheel, and areconnected by means of bolts or other fastenings 45 with lugs e6 formedon the casing 5 of the machine.

The ratchet sleeve 40 is provided exteriorly with a. plurality(preferably 1:2) of longitudinally extending equally spaced grooves orkey-ways e7, having squared upper and lower ends 48, and the grooves d7are interconnected adjacent their upper ends by inclined ways 48 whichextend in a common direction and which occur at an angle of aboutdegrees, as clearly shown in Figs. 11 to 13 inclusive of the drawing.Adapted toride in the grooves 4L7 are a pair of diametrically opposedtriggers indicated generally 4C9, These triggers are arranged within thecylindrical casing 5, and each includes a cylindrical portion 50 mountedfor oscillation at one end in a socheted plug 51 (see Fig, 10) threadedinto an opening in the wall of easing 5. The triggers each include asubstantially rectangular shoe 51 adapted to ride in the grooves orkeyways, and at right angles to. its shoe 51 each key is equipped with aweighted arm thrust downwardly by a spring carried by the casing 5 (Fig..6).

The shoe portions 51 01": the triggers fit tor sliding movement into oneof the grooves it? on opposite sidesoif the ratchet sleeve a1, and asthe sleeve moves downwardly with the spindle as the working stroke isimparted through the action of the expanding Spring 30, each shoe will,so to speak, ride upwardly in a groove in which it fits until the end ofthe working stroke is reached, at "which time the shoe will be at theupper end of the particular groove in which it may happen to be working.As the shoe comes opposite the upper end of the inclined Way l8 leadinginto this groove, the action or" the spring in continuously pressingdownwardly on the arm will move the shoe 51* into alinen'ient with thesaid inclined way in the position indicated in Fig. 11,,and as soon asthe ratchet sleeve starts upwardly with the spindle for compressing thespring,

the cam action between the shoe 51 and inclined way e8 will shift orrotate the ratchet sleeve, and with it the lower segment of the ratchetspindle about its axis, the distance occurring between two adjacentgrooves or keyways 4:7, and as the upward motion. of the ratchet sleevecontinues as indicated in Fig. 12, the shoe will line up with the nextgroove in which it runs, thus stopping the rotary movement of thespindle,

and confining it to a longitudinal reciprocatory movement, until the endof the next working stroke will have been reached, whereupon the sameoperation will be repeated. It will thus be seen that as the spindle isreciproc-ated it is intermittently rotated a part of a revolution. Thespring pressed pawl as in coiiperat-ing with the ratchet wheel ll willprevent any tendency for reverse rotation on the part of the spindle. I

The lower end of the spindle or shaft is equipped with a socket 54, inwhich a plate 55, serrated at its lower portion as at 56, is carried.This plate is adapted to be clamped against the shank of a drill throughthe action of set screws 57 for securing the drill in place.

Although I have describedthe preferred embodiment of my invention, I maydesire to make such changes in the construction,

'i'iovenient and prevented. from moving longitudinally with the spindleand having a shoe to cooperate with the said key-ways and inclined-waysto impart a step by step rotary movement to the spindle.

Y 2. In a drill, a retiprocatory spindle provided with longitudinallydisposed keyways and intercoininunicating inclinedways, a triggermounted to oscillate and prevented from moving longitudinally with thespindle and having a shoe to cooperate with the key-ways and inclinedways to impart a step by step rotary movement to the spindle, a ratchetwheel, having splined connection with the said spindle to turn therewithhut leaving such spindle free to, reciprocate therein, and a pawlcoacting with the ratchet wheel to prevent haclovard rotation thereo 3.In a drilling machine, a reciprocatory spindle, means for actuating thespindle, a ratchet sleeve fixed. on the spindle, and having a pluralityof spaced parallel grooves extending longitudinally of the sleeve, in-

clined ways extending in a common direction and interconnecting thegrooves near the upper ends of the latter, a trigger rela tive to whichthe ratchet sleeve is adapted to reciprocate, said trigger including ashoe slidable in the grooves, spring means for directing the shoe intoone of the inclined ways when the ratchet sleeve reaches one end of itsstroke, a ratchet wheel slidably keyed upon the ratchet sleeve, andmeans coacting with the ratchet wheel in preventing reverse rotation ofthe ratchet sleeve.

l. A drilling machine including a reciprocatory spindle, a ratchetsleeve fixed there on and provided with a series of spaced parallelgrooves extending longitudinally of the sleeve, inclined parallel waysinterconnecting the grooves adjacent one end of the latter, ashoe'slidable in the grooves and in relation to which the sleeveisadapted to reciprocate, means for automatically directing the shoeinto succeeding inclined ways, as the ratchet sleeve reaches the end ofits stroke in one direction, a ratchet Wheel mounted on the sleeve, andmeans cotiperating with the ratchet wheel in preventing reverse rotationof the ratchet sleeve.

In a drilling machine, a reciprocatory spindle, a ratchet sleeve fixedthereon and provided with a plurality of spaced parallel groovesextending longitudinally of the said sleeve, inclined parallel waysinterconnecting the grooves adjacent one end of the latter, a shoeslidable in the grooves and in relation to which tne sleeve is adaptedto reciprocate, means for automatically directing the shoe intosucceeding Ways as the sleeve reaches the end of its stroke in onedirection, and means fer preventing reverse rotation of the ratchetsleeve 6. A drilling machine including a casing, a reciprocatory spindleextending thereinto, a ratchet eleci'e lined in relation to the spindleand arranged Within the casing, said sleeve being provided with aplurality of longitudinally extending parallel grooves, inclinedparallel ways interconnecting the grooves adjacent one end of thelatter, means mounted on the casing slidably en gaging in the grooves,means for autoinatically directing the first said means into theinclined Ways as the ratchet sleeve reaches the end of its stroke in onedirection for imparting an intermittent rotary movement to the ratchetsleeve, a ratchet Wheel slid-ably keyed on the ratchet sleeve, and meanscarried by the casing cooperating with the ratchet wheel in preventingreverse rotation of the ratchet sleeve.

7. A drilling machine, comprising a cas- Gopies ing, a spindle mountedWithin the casing and adapted to have a reciprocatory move ment impartedthereto and provided With longitudinal key-Ways and intercominunieatingWays, a trigger mounted upon the casing and having a shoe to coact Withthe lon itudinal key-Ways and the inclined-Ways to impart a step by steprotation to the spindle, ratchet vv reel mounted Within the casin g andhaving the spindle slidable therein and rotatable therewith, and a pawlcarried by the casing and cooperating With the ratchet Wheel to preventbackward rotation thereof: and the spindle.

h. In a drilling machine, a reciprocatory spindle, a ratchet sleevefixed thereon a d provided with a plurality of parallel grooves,inclined grooves interconnecting the parallel grooves, means withrespect to which the sleeve reciprocates for traveling in the grooves,and means for automatically causing the travel of the first said meansthrough successive inclined grooves as the sleeve reaches the end of itsstroke in one direction for intermittently causing the rotation of thesleeve, and means for preventing reverse rotation of the ratchet sleeve.

DANE SPEHAR.

lVitnesses: V

CHAS. J. Gonnnrorn, S'rnwi M. Arson,

of this patent may be obtained for live cents each, by addressing theCommissioner of Eatents,

Washington, 2). t1.

